GUARD AS 1475332 - Caterpillar

Illustration 1 g01228500
Steering Charge Filter
(1) Oil Sampling Port
(2) Filter Element
(3) Bypass Valve
(4) Passage to Steering Pump
(5) Passage from Steering Charge Pump
(6) Bypass Pressure Switch
(7) Filter Housing
(8) Charge Pressure Sensor Oil enters the steering charge filter through passage (5) from the steering charge pump.Charge oil fills the space between the inside of filter housing (7) and filter element (2). During normal operation, the oil flows through filter element (2). The filter element stops any debris that is in the oil. The oil then flows to the rest of the steering system. If the filter element is full of debris, the restriction to the flow causes a pressure increase on the outside of the filter. The pressure oil causes bypass valve (3) to open. The oil flows through the open bypass valve directly to the steering hydraulic system. The debris in the oil can cause damage to the other components in the hydraulic system when the oil does not go through the filter element.
Illustration 2 g01228559When the bypass valve opens, bypass pressure sensor (6) activates. Bypass pressure sensor (6) sends a signal to the hydraulic ECM. Cat Monitor will activate the "Indicator Light" on the dash panel in order to notify the operator that the steering charge filter is being bypassed. If this occurs and the oil is at normal operating temperature, inspect the filter element for restrictions.Correct maintenance must be used in order to make sure that the filter element does not become full of debris.